The lithium (Li) metal serves as a promising anode for rechargeable batteries, but dendrite growth and low Coulombic efficiency (CE) hamper its commercialization. Herein, we fabricate a 3D lithiophilic and conductive N-CNT@Cu₂O@Cu framework to suppress Li dendrites for the first time. It is a nitrogen-doped carbon nanotube (N-CNT) network with core–shell Cu₂O@Cu. N-CNTs and Cu₂O are lithiophilic for Li nucleation. CNTs and Cu nanoparticles on Cu₂O constitute a conductive framework to effectively transfer electrons and Li⁺ and reduce local current density. Moreover, Cu₂O@Cu serves as a concentrator to attract Li⁺ and connect several N-CNT fibers for effective current transmission. This structure proves to have an eminent synergistic effect in suppressing dendrites, which shows excellent electrochemical performance: a high CE of about 97% even after 1100 cycles with the Li–S electrolyte, which exceeds that of almost all published works to inhibit Li dendrites. It also exhibits impressive electrochemical performance in symmetric and full cells. It would shed light on the research of impeding dendrites and prospering the development of alkali-metal batteries.

中文翻译：

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无树突状锂金属电池的3D亲硫导电N-CNT @ Cu ₂ O @ Cu框架

锂（Li）金属可作为可充电电池的理想阳极，但树枝状晶体的生长和低库仑效率（CE）阻碍了其商业化。在本文中，我们首次制造了3D亲硫且导电的N-CNT @ Cu ₂ O @ Cu骨架，以抑制Li树突。它是一个氮掺杂的碳纳米管（N-CNT）网络，其核壳为Cu ₂ O @ Cu。N-CNT和Cu ₂ O对Li成核具有亲硫性。Cu ₂ O上的CNT和Cu纳米颗粒构成导电框架，可有效转移电子和Li ⁺并降低局部电流密度。此外，Cu ₂ O @ Cu用作吸引Li ⁺的集中器并连接多条N-CNT光纤以有效传输电流。事实证明，这种结构在抑制树枝状晶体方面具有显着的协同作用，显示出优异的电化学性能：即使在使用Li–S电解质进行1100次循环后，CE仍达到约97％，超过了几乎所有已发表的抑制Li树枝状晶体的工作。在对称电池和全电池中，它还表现出令人印象深刻的电化学性能。它将为阻止树枝状晶体和繁荣碱金属电池的研究提供启示。